Strength of Materials
The angle which an inclined plane makes with the horizontal when a body placed on it is about to move down is known as angle of

repose
kinematic friction
friction
limiting friction

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Strength of Materials
Center of percussion is

point of suspension
the point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis
the point of metacentre
the point of C.G.

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